<abbreviation>
1)
Electronics; Alternating Current;
A current which follows the pattern of a Sine wave. The voltage increases, reaches a peak, dips, goes into the negative, reaches a trough, curves up again back through 0 Volts into positive.

A.C. is used as a mains voltage supply because it can be efficiently stepped up and down from the power plant and can be transported through relatively small cables across the country due to the current being stepped down and the voltage increased to around 270kV so you get the same power, but you dont need huge cables. See also D.C.

This type of electrical current is called alternating because it switches direction. Direct current (DC) is often seen as the opposite of AC since DC only flows in one direction. Alternating current is used in most applications including the electricity that comes out of the outlet in your wall.

Anti-chill; any behavior that completely violates the essence of chill.

Robbie: I'm so fucking pissed I didn't close last night, such bullshit. Get the fuck away from me.
Ethan: Relax, dude. You're being AC. Get off your ass and let's get fucked up with the boys.
Robbie: That's pretty eeb, but minus well.